./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:34:44,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:34:44,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:34:44,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:34:44,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:34:44,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:34:44,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:34:44,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:34:44,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:34:44,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:34:44,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:34:44,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:34:44,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:34:44,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:34:44,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:34:44,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:34:44,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:34:44,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:34:44,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:34:44,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:34:44,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:34:44,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:34:44,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:34:44,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:34:44,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:34:44,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:34:44,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:34:44,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:34:44,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:34:44,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:34:44,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:34:44,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:34:44,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:34:44,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:34:44,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:34:44,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:34:44,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:34:44,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:34:44,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:34:44,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:34:44,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:34:44,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:34:44,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:34:44,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:34:44,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:34:44,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:34:44,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:34:44,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:34:44,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:34:44,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:34:44,308 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:34:44,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:34:44,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:34:44,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:34:44,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:34:44,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:34:44,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:34:44,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:34:44,310 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:34:44,311 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:34:44,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:34:44,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:34:44,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 [2021-12-06 17:34:44,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:34:44,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:34:44,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:34:44,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:34:44,517 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:34:44,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2021-12-06 17:34:44,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/data/7b8a47d26/6c185eb4ba71400c881a4ba18c8578fd/FLAG13d17c94e [2021-12-06 17:34:44,985 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:34:44,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2021-12-06 17:34:44,999 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/data/7b8a47d26/6c185eb4ba71400c881a4ba18c8578fd/FLAG13d17c94e [2021-12-06 17:34:45,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/data/7b8a47d26/6c185eb4ba71400c881a4ba18c8578fd [2021-12-06 17:34:45,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:34:45,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:34:45,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:34:45,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:34:45,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:34:45,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6007dff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45, skipping insertion in model container [2021-12-06 17:34:45,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:34:45,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:34:45,182 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[911,924] [2021-12-06 17:34:45,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[8416,8429] [2021-12-06 17:34:45,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:34:45,279 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:34:45,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[911,924] [2021-12-06 17:34:45,301 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[8416,8429] [2021-12-06 17:34:45,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:34:45,346 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:34:45,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45 WrapperNode [2021-12-06 17:34:45,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:34:45,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:34:45,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:34:45,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:34:45,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,396 INFO L137 Inliner]: procedures = 71, calls = 86, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 851 [2021-12-06 17:34:45,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:34:45,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:34:45,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:34:45,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:34:45,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:34:45,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:34:45,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:34:45,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:34:45,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (1/1) ... [2021-12-06 17:34:45,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:34:45,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:45,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:34:45,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3938a6-9063-497e-a27b-869251fd46f8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:34:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:34:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 17:34:45,495 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 17:34:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-06 17:34:45,495 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-06 17:34:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-06 17:34:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-06 17:34:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-06 17:34:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-06 17:34:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-06 17:34:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-06 17:34:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-06 17:34:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-06 17:34:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-06 17:34:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-06 17:34:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-06 17:34:45,497 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-06 17:34:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-06 17:34:45,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-06 17:34:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-06 17:34:45,497 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-06 17:34:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-06 17:34:45,497 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-06 17:34:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:34:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-06 17:34:45,497 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-06 17:34:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-06 17:34:45,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-06 17:34:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:34:45,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:34:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-06 17:34:45,498 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-06 17:34:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-06 17:34:45,498 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-06 17:34:45,588 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:34:45,590 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:34:46,045 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-06 17:34:46,046 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-06 17:34:46,090 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:34:46,104 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:34:46,104 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-06 17:34:46,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:34:46 BoogieIcfgContainer [2021-12-06 17:34:46,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:34:46,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:34:46,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:34:46,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:34:46,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:34:45" (1/3) ... [2021-12-06 17:34:46,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b31bcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:34:46, skipping insertion in model container [2021-12-06 17:34:46,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:45" (2/3) ... [2021-12-06 17:34:46,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b31bcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:34:46, skipping insertion in model container [2021-12-06 17:34:46,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:34:46" (3/3) ... [2021-12-06 17:34:46,113 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-2.c [2021-12-06 17:34:46,117 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:34:46,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 17:34:46,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:34:46,159 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:34:46,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 17:34:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 407 states, 349 states have (on average 1.6246418338108883) internal successors, (567), 357 states have internal predecessors, (567), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-06 17:34:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:34:46,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:46,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:46,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1818401175, now seen corresponding path program 1 times [2021-12-06 17:34:46,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:46,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012918112] [2021-12-06 17:34:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:46,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 17:34:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 17:34:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:34:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:34:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:34:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:46,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012918112] [2021-12-06 17:34:46,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012918112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:46,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:46,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:34:46,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160292440] [2021-12-06 17:34:46,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:34:46,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:34:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:34:46,484 INFO L87 Difference]: Start difference. First operand has 407 states, 349 states have (on average 1.6246418338108883) internal successors, (567), 357 states have internal predecessors, (567), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:34:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:47,259 INFO L93 Difference]: Finished difference Result 940 states and 1489 transitions. [2021-12-06 17:34:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:34:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 17:34:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:47,275 INFO L225 Difference]: With dead ends: 940 [2021-12-06 17:34:47,275 INFO L226 Difference]: Without dead ends: 547 [2021-12-06 17:34:47,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:34:47,283 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 745 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:47,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 2114 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:34:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-06 17:34:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 508. [2021-12-06 17:34:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 431 states have (on average 1.5127610208816706) internal successors, (652), 438 states have internal predecessors, (652), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2021-12-06 17:34:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 759 transitions. [2021-12-06 17:34:47,358 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 759 transitions. Word has length 65 [2021-12-06 17:34:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 759 transitions. [2021-12-06 17:34:47,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:34:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 759 transitions. [2021-12-06 17:34:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:34:47,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:47,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:47,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:34:47,364 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -139512535, now seen corresponding path program 1 times [2021-12-06 17:34:47,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:47,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456129287] [2021-12-06 17:34:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:47,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 17:34:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 17:34:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:34:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:34:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:34:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:47,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:47,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456129287] [2021-12-06 17:34:47,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456129287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:47,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:47,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:34:47,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530304308] [2021-12-06 17:34:47,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:47,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:34:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:34:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:34:47,471 INFO L87 Difference]: Start difference. First operand 508 states and 759 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:34:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:48,216 INFO L93 Difference]: Finished difference Result 905 states and 1325 transitions. [2021-12-06 17:34:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:34:48,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 17:34:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:48,222 INFO L225 Difference]: With dead ends: 905 [2021-12-06 17:34:48,222 INFO L226 Difference]: Without dead ends: 696 [2021-12-06 17:34:48,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:34:48,225 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1447 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:48,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 2140 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:34:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-06 17:34:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 620. [2021-12-06 17:34:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 521 states have (on average 1.493282149712092) internal successors, (778), 530 states have internal predecessors, (778), 66 states have call successors, (66), 29 states have call predecessors, (66), 31 states have return successors, (75), 64 states have call predecessors, (75), 62 states have call successors, (75) [2021-12-06 17:34:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 919 transitions. [2021-12-06 17:34:48,275 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 919 transitions. Word has length 65 [2021-12-06 17:34:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:48,276 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 919 transitions. [2021-12-06 17:34:48,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:34:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 919 transitions. [2021-12-06 17:34:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:34:48,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:48,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:48,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:34:48,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2126868651, now seen corresponding path program 1 times [2021-12-06 17:34:48,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:48,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114184559] [2021-12-06 17:34:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:48,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 17:34:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 17:34:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:34:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:34:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:34:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:48,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:48,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114184559] [2021-12-06 17:34:48,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114184559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:48,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:48,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:34:48,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047519425] [2021-12-06 17:34:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:48,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:34:48,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:34:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:48,364 INFO L87 Difference]: Start difference. First operand 620 states and 919 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:34:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:48,862 INFO L93 Difference]: Finished difference Result 1292 states and 1861 transitions. [2021-12-06 17:34:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:34:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-06 17:34:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:48,867 INFO L225 Difference]: With dead ends: 1292 [2021-12-06 17:34:48,867 INFO L226 Difference]: Without dead ends: 977 [2021-12-06 17:34:48,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:34:48,869 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 1551 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:48,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1645 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:34:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-06 17:34:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 901. [2021-12-06 17:34:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 747 states have (on average 1.4524765729585007) internal successors, (1085), 760 states have internal predecessors, (1085), 96 states have call successors, (96), 50 states have call predecessors, (96), 56 states have return successors, (113), 94 states have call predecessors, (113), 92 states have call successors, (113) [2021-12-06 17:34:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1294 transitions. [2021-12-06 17:34:48,912 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1294 transitions. Word has length 65 [2021-12-06 17:34:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:48,912 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1294 transitions. [2021-12-06 17:34:48,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:34:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1294 transitions. [2021-12-06 17:34:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:34:48,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:48,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:48,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:34:48,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2083099193, now seen corresponding path program 1 times [2021-12-06 17:34:48,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:48,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896999971] [2021-12-06 17:34:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:48,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 17:34:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 17:34:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:34:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:48,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 17:34:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 17:34:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 17:34:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:49,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896999971] [2021-12-06 17:34:49,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896999971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:49,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:49,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:34:49,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991763] [2021-12-06 17:34:49,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:49,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:34:49,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:34:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:49,010 INFO L87 Difference]: Start difference. First operand 901 states and 1294 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 17:34:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:49,638 INFO L93 Difference]: Finished difference Result 1575 states and 2230 transitions. [2021-12-06 17:34:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:34:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-06 17:34:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:49,643 INFO L225 Difference]: With dead ends: 1575 [2021-12-06 17:34:49,644 INFO L226 Difference]: Without dead ends: 979 [2021-12-06 17:34:49,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:34:49,646 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 508 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 2840 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:49,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 2840 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:34:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-12-06 17:34:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 916. [2021-12-06 17:34:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 759 states have (on average 1.4413702239789197) internal successors, (1094), 772 states have internal predecessors, (1094), 96 states have call successors, (96), 50 states have call predecessors, (96), 59 states have return successors, (116), 97 states have call predecessors, (116), 92 states have call successors, (116) [2021-12-06 17:34:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1306 transitions. [2021-12-06 17:34:49,692 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1306 transitions. Word has length 66 [2021-12-06 17:34:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:49,693 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1306 transitions. [2021-12-06 17:34:49,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 17:34:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1306 transitions. [2021-12-06 17:34:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:34:49,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:49,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:49,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:34:49,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1053739895, now seen corresponding path program 1 times [2021-12-06 17:34:49,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:49,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674635962] [2021-12-06 17:34:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:49,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 17:34:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 17:34:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:34:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 17:34:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 17:34:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 17:34:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:49,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:49,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674635962] [2021-12-06 17:34:49,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674635962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:49,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:49,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:34:49,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926611897] [2021-12-06 17:34:49,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:49,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:34:49,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:34:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:49,818 INFO L87 Difference]: Start difference. First operand 916 states and 1306 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:34:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,236 INFO L93 Difference]: Finished difference Result 3121 states and 4427 transitions. [2021-12-06 17:34:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 17:34:51,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-06 17:34:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,245 INFO L225 Difference]: With dead ends: 3121 [2021-12-06 17:34:51,245 INFO L226 Difference]: Without dead ends: 1279 [2021-12-06 17:34:51,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 17:34:51,250 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 2079 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 2941 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2101 Valid, 2941 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:34:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-12-06 17:34:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1124. [2021-12-06 17:34:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 911 states have (on average 1.402854006586169) internal successors, (1278), 928 states have internal predecessors, (1278), 126 states have call successors, (126), 71 states have call predecessors, (126), 85 states have return successors, (165), 128 states have call predecessors, (165), 122 states have call successors, (165) [2021-12-06 17:34:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1569 transitions. [2021-12-06 17:34:51,304 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1569 transitions. Word has length 66 [2021-12-06 17:34:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,304 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1569 transitions. [2021-12-06 17:34:51,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:34:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1569 transitions. [2021-12-06 17:34:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 17:34:51,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:34:51,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1116762774, now seen corresponding path program 1 times [2021-12-06 17:34:51,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391458212] [2021-12-06 17:34:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 17:34:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 17:34:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:34:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 17:34:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 17:34:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 17:34:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:51,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391458212] [2021-12-06 17:34:51,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391458212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:34:51,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398299955] [2021-12-06 17:34:51,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:34:51,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:34:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:51,394 INFO L87 Difference]: Start difference. First operand 1124 states and 1569 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:34:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,974 INFO L93 Difference]: Finished difference Result 2309 states and 3194 transitions. [2021-12-06 17:34:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:34:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2021-12-06 17:34:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,976 INFO L225 Difference]: With dead ends: 2309 [2021-12-06 17:34:51,977 INFO L226 Difference]: Without dead ends: 285 [2021-12-06 17:34:51,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:34:51,983 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1594 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1636 Valid, 1980 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:34:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-06 17:34:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-12-06 17:34:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 256 states have internal predecessors, (398), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 17:34:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 444 transitions. [2021-12-06 17:34:52,005 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 444 transitions. Word has length 67 [2021-12-06 17:34:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:52,005 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 444 transitions. [2021-12-06 17:34:52,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:34:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 444 transitions. [2021-12-06 17:34:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:34:52,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:52,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:52,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:34:52,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -765108049, now seen corresponding path program 1 times [2021-12-06 17:34:52,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122233457] [2021-12-06 17:34:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:52,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:34:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:34:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:34:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:52,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:52,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122233457] [2021-12-06 17:34:52,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122233457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:52,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:52,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:34:52,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142170276] [2021-12-06 17:34:52,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:52,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:52,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:52,098 INFO L87 Difference]: Start difference. First operand 285 states and 444 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:52,626 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2021-12-06 17:34:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:34:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:34:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:52,629 INFO L225 Difference]: With dead ends: 659 [2021-12-06 17:34:52,629 INFO L226 Difference]: Without dead ends: 383 [2021-12-06 17:34:52,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:34:52,630 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 742 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:52,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 807 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:34:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-06 17:34:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 285. [2021-12-06 17:34:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.562992125984252) internal successors, (397), 256 states have internal predecessors, (397), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 17:34:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 443 transitions. [2021-12-06 17:34:52,644 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 443 transitions. Word has length 135 [2021-12-06 17:34:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:52,644 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 443 transitions. [2021-12-06 17:34:52,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 443 transitions. [2021-12-06 17:34:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:34:52,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:52,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:52,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:34:52,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:52,646 INFO L85 PathProgramCache]: Analyzing trace with hash -58511443, now seen corresponding path program 1 times [2021-12-06 17:34:52,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:52,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409050096] [2021-12-06 17:34:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:52,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:34:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:34:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:34:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:52,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409050096] [2021-12-06 17:34:52,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409050096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:52,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:52,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:34:52,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048732451] [2021-12-06 17:34:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:52,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:34:52,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:34:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:34:52,739 INFO L87 Difference]: Start difference. First operand 285 states and 443 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:53,851 INFO L93 Difference]: Finished difference Result 1027 states and 1634 transitions. [2021-12-06 17:34:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:34:53,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:34:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:53,855 INFO L225 Difference]: With dead ends: 1027 [2021-12-06 17:34:53,856 INFO L226 Difference]: Without dead ends: 759 [2021-12-06 17:34:53,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:34:53,857 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 1109 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:53,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1304 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:34:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-06 17:34:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 562. [2021-12-06 17:34:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 510 states have internal predecessors, (799), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-06 17:34:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 882 transitions. [2021-12-06 17:34:53,892 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 882 transitions. Word has length 135 [2021-12-06 17:34:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:53,892 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 882 transitions. [2021-12-06 17:34:53,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 882 transitions. [2021-12-06 17:34:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:34:53,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:53,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:53,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:34:53,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:53,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1420513879, now seen corresponding path program 1 times [2021-12-06 17:34:53,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:53,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186517054] [2021-12-06 17:34:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:53,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:34:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:34:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:34:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:53,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186517054] [2021-12-06 17:34:53,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186517054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:53,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:53,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:34:53,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95203293] [2021-12-06 17:34:53,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:53,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:34:53,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:34:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:53,988 INFO L87 Difference]: Start difference. First operand 562 states and 882 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:55,462 INFO L93 Difference]: Finished difference Result 1690 states and 2692 transitions. [2021-12-06 17:34:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:34:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:34:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:55,468 INFO L225 Difference]: With dead ends: 1690 [2021-12-06 17:34:55,469 INFO L226 Difference]: Without dead ends: 1145 [2021-12-06 17:34:55,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:34:55,471 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1120 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:55,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 2248 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:34:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-06 17:34:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 820. [2021-12-06 17:34:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 741 states have (on average 1.5695006747638327) internal successors, (1163), 745 states have internal predecessors, (1163), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-06 17:34:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1282 transitions. [2021-12-06 17:34:55,522 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1282 transitions. Word has length 135 [2021-12-06 17:34:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:55,522 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1282 transitions. [2021-12-06 17:34:55,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1282 transitions. [2021-12-06 17:34:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:34:55,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:55,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:55,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:34:55,524 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash 508418347, now seen corresponding path program 1 times [2021-12-06 17:34:55,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:55,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813330214] [2021-12-06 17:34:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:55,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:34:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:34:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:34:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:55,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:55,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813330214] [2021-12-06 17:34:55,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813330214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:55,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:55,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:34:55,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963366115] [2021-12-06 17:34:55,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:55,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:34:55,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:34:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:55,619 INFO L87 Difference]: Start difference. First operand 820 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:57,165 INFO L93 Difference]: Finished difference Result 2667 states and 4240 transitions. [2021-12-06 17:34:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:34:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:34:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:57,174 INFO L225 Difference]: With dead ends: 2667 [2021-12-06 17:34:57,174 INFO L226 Difference]: Without dead ends: 1864 [2021-12-06 17:34:57,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:34:57,177 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 1120 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:57,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 2234 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:34:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-12-06 17:34:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1337. [2021-12-06 17:34:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1210 states have (on average 1.5636363636363637) internal successors, (1892), 1216 states have internal predecessors, (1892), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-06 17:34:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2087 transitions. [2021-12-06 17:34:57,253 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2087 transitions. Word has length 135 [2021-12-06 17:34:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:57,253 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 2087 transitions. [2021-12-06 17:34:57,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2087 transitions. [2021-12-06 17:34:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:34:57,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:57,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:57,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:34:57,255 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1784662679, now seen corresponding path program 1 times [2021-12-06 17:34:57,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:57,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517098412] [2021-12-06 17:34:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:57,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:34:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:34:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:34:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:57,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517098412] [2021-12-06 17:34:57,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517098412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:57,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:57,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:34:57,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376282065] [2021-12-06 17:34:57,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:57,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:34:57,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:57,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:34:57,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:57,349 INFO L87 Difference]: Start difference. First operand 1337 states and 2087 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:58,965 INFO L93 Difference]: Finished difference Result 4545 states and 7201 transitions. [2021-12-06 17:34:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:34:58,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:34:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:58,979 INFO L225 Difference]: With dead ends: 4545 [2021-12-06 17:34:58,979 INFO L226 Difference]: Without dead ends: 3225 [2021-12-06 17:34:58,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:34:58,983 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 1115 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 2226 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:58,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 2226 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 17:34:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-12-06 17:34:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2377. [2021-12-06 17:34:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.5598885793871866) internal successors, (3360), 2164 states have internal predecessors, (3360), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-06 17:34:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3713 transitions. [2021-12-06 17:34:59,113 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3713 transitions. Word has length 135 [2021-12-06 17:34:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:59,114 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 3713 transitions. [2021-12-06 17:34:59,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:34:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3713 transitions. [2021-12-06 17:34:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:34:59,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:59,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:59,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:34:59,116 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:34:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:59,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1313306329, now seen corresponding path program 1 times [2021-12-06 17:34:59,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:59,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273206684] [2021-12-06 17:34:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:59,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:34:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:34:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:34:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:34:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:34:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:59,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:59,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273206684] [2021-12-06 17:34:59,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273206684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:59,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:59,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:34:59,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899002490] [2021-12-06 17:34:59,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:59,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:34:59,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:34:59,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:59,196 INFO L87 Difference]: Start difference. First operand 2377 states and 3713 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:00,898 INFO L93 Difference]: Finished difference Result 8311 states and 13157 transitions. [2021-12-06 17:35:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:35:00,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:35:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:00,921 INFO L225 Difference]: With dead ends: 8311 [2021-12-06 17:35:00,921 INFO L226 Difference]: Without dead ends: 5951 [2021-12-06 17:35:00,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:35:00,927 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 1191 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:00,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 1544 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:35:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-12-06 17:35:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4462. [2021-12-06 17:35:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4047 states have (on average 1.5572028663207313) internal successors, (6302), 4065 states have internal predecessors, (6302), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-06 17:35:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 6989 transitions. [2021-12-06 17:35:01,165 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 6989 transitions. Word has length 135 [2021-12-06 17:35:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:01,165 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 6989 transitions. [2021-12-06 17:35:01,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 6989 transitions. [2021-12-06 17:35:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:35:01,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:01,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:01,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:35:01,169 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1334298025, now seen corresponding path program 1 times [2021-12-06 17:35:01,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:01,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558257493] [2021-12-06 17:35:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:01,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:01,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:35:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:01,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:35:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:01,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:35:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:01,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:35:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:01,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:35:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:01,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:01,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558257493] [2021-12-06 17:35:01,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558257493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:01,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:01,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:35:01,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785849105] [2021-12-06 17:35:01,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:01,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:35:01,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:35:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:01,260 INFO L87 Difference]: Start difference. First operand 4462 states and 6989 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:02,306 INFO L93 Difference]: Finished difference Result 10454 states and 16616 transitions. [2021-12-06 17:35:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:35:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:35:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:02,330 INFO L225 Difference]: With dead ends: 10454 [2021-12-06 17:35:02,330 INFO L226 Difference]: Without dead ends: 6009 [2021-12-06 17:35:02,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:35:02,339 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 808 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:02,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1172 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:35:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6009 states. [2021-12-06 17:35:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6009 to 4462. [2021-12-06 17:35:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4047 states have (on average 1.553002223869533) internal successors, (6285), 4065 states have internal predecessors, (6285), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-06 17:35:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 6972 transitions. [2021-12-06 17:35:02,590 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 6972 transitions. Word has length 135 [2021-12-06 17:35:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:02,590 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 6972 transitions. [2021-12-06 17:35:02,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 6972 transitions. [2021-12-06 17:35:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:35:02,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:02,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:02,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:35:02,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:02,594 INFO L85 PathProgramCache]: Analyzing trace with hash -797052697, now seen corresponding path program 1 times [2021-12-06 17:35:02,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:02,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157862426] [2021-12-06 17:35:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:02,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:02,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:35:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:02,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:35:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:02,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:35:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:02,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:35:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:35:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:02,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157862426] [2021-12-06 17:35:02,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157862426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:02,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:02,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:35:02,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139285565] [2021-12-06 17:35:02,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:02,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:35:02,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:35:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:02,677 INFO L87 Difference]: Start difference. First operand 4462 states and 6972 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:04,730 INFO L93 Difference]: Finished difference Result 15824 states and 25007 transitions. [2021-12-06 17:35:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:35:04,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:35:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:04,765 INFO L225 Difference]: With dead ends: 15824 [2021-12-06 17:35:04,766 INFO L226 Difference]: Without dead ends: 11379 [2021-12-06 17:35:04,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:35:04,777 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1106 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:04,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 2210 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 17:35:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11379 states. [2021-12-06 17:35:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11379 to 8664. [2021-12-06 17:35:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8664 states, 7865 states have (on average 1.5502860775588048) internal successors, (12193), 7899 states have internal predecessors, (12193), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-12-06 17:35:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8664 states to 8664 states and 13602 transitions. [2021-12-06 17:35:05,258 INFO L78 Accepts]: Start accepts. Automaton has 8664 states and 13602 transitions. Word has length 135 [2021-12-06 17:35:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:05,258 INFO L470 AbstractCegarLoop]: Abstraction has 8664 states and 13602 transitions. [2021-12-06 17:35:05,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8664 states and 13602 transitions. [2021-12-06 17:35:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:35:05,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:05,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:05,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:35:05,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1835637271, now seen corresponding path program 1 times [2021-12-06 17:35:05,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:05,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372607963] [2021-12-06 17:35:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:05,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:35:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:35:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:35:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:35:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:35:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:05,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:05,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372607963] [2021-12-06 17:35:05,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372607963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:05,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:05,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:35:05,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318471748] [2021-12-06 17:35:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:05,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:35:05,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:35:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:05,349 INFO L87 Difference]: Start difference. First operand 8664 states and 13602 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:08,029 INFO L93 Difference]: Finished difference Result 30888 states and 49047 transitions. [2021-12-06 17:35:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:35:08,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:35:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:08,084 INFO L225 Difference]: With dead ends: 30888 [2021-12-06 17:35:08,084 INFO L226 Difference]: Without dead ends: 22241 [2021-12-06 17:35:08,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:35:08,107 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 1105 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:08,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 2205 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 17:35:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22241 states. [2021-12-06 17:35:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22241 to 17097. [2021-12-06 17:35:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17097 states, 15530 states have (on average 1.5486799742433999) internal successors, (24051), 15596 states have internal predecessors, (24051), 1112 states have call successors, (1112), 391 states have call predecessors, (1112), 454 states have return successors, (1903), 1173 states have call predecessors, (1903), 1110 states have call successors, (1903) [2021-12-06 17:35:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17097 states to 17097 states and 27066 transitions. [2021-12-06 17:35:09,118 INFO L78 Accepts]: Start accepts. Automaton has 17097 states and 27066 transitions. Word has length 135 [2021-12-06 17:35:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:09,118 INFO L470 AbstractCegarLoop]: Abstraction has 17097 states and 27066 transitions. [2021-12-06 17:35:09,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 17097 states and 27066 transitions. [2021-12-06 17:35:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:35:09,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:09,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:09,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:35:09,126 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash 486164647, now seen corresponding path program 1 times [2021-12-06 17:35:09,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:09,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728816515] [2021-12-06 17:35:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:09,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:09,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:35:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:09,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:35:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:09,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:35:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:09,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:35:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:09,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:35:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:09,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728816515] [2021-12-06 17:35:09,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728816515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:09,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:09,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:35:09,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844483324] [2021-12-06 17:35:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:09,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:35:09,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:35:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:09,220 INFO L87 Difference]: Start difference. First operand 17097 states and 27066 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:14,504 INFO L93 Difference]: Finished difference Result 68759 states and 109503 transitions. [2021-12-06 17:35:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:35:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:35:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:14,632 INFO L225 Difference]: With dead ends: 68759 [2021-12-06 17:35:14,632 INFO L226 Difference]: Without dead ends: 51679 [2021-12-06 17:35:14,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:35:14,672 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 1187 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:14,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 2326 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:35:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51679 states. [2021-12-06 17:35:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51679 to 33834. [2021-12-06 17:35:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33834 states, 30795 states have (on average 1.55002435460302) internal successors, (47733), 30925 states have internal predecessors, (47733), 2136 states have call successors, (2136), 775 states have call predecessors, (2136), 902 states have return successors, (4449), 2261 states have call predecessors, (4449), 2134 states have call successors, (4449) [2021-12-06 17:35:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33834 states to 33834 states and 54318 transitions. [2021-12-06 17:35:16,805 INFO L78 Accepts]: Start accepts. Automaton has 33834 states and 54318 transitions. Word has length 135 [2021-12-06 17:35:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:16,806 INFO L470 AbstractCegarLoop]: Abstraction has 33834 states and 54318 transitions. [2021-12-06 17:35:16,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 33834 states and 54318 transitions. [2021-12-06 17:35:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:35:16,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:16,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:16,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:35:16,822 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1655695831, now seen corresponding path program 1 times [2021-12-06 17:35:16,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:16,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631175085] [2021-12-06 17:35:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:16,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:35:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:35:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:35:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:35:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:35:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:16,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:16,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631175085] [2021-12-06 17:35:16,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631175085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:16,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:16,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:35:16,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813681464] [2021-12-06 17:35:16,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:16,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:35:16,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:16,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:35:16,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:16,909 INFO L87 Difference]: Start difference. First operand 33834 states and 54318 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:25,853 INFO L93 Difference]: Finished difference Result 134646 states and 217285 transitions. [2021-12-06 17:35:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:35:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:35:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:26,131 INFO L225 Difference]: With dead ends: 134646 [2021-12-06 17:35:26,131 INFO L226 Difference]: Without dead ends: 100829 [2021-12-06 17:35:26,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:35:26,208 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 1396 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:26,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1420 Valid, 2179 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 17:35:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100829 states. [2021-12-06 17:35:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100829 to 65963. [2021-12-06 17:35:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65963 states, 60044 states have (on average 1.546449270534941) internal successors, (92855), 60302 states have internal predecessors, (92855), 4120 states have call successors, (4120), 1543 states have call predecessors, (4120), 1798 states have return successors, (10935), 4373 states have call predecessors, (10935), 4118 states have call successors, (10935) [2021-12-06 17:35:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65963 states to 65963 states and 107910 transitions. [2021-12-06 17:35:30,736 INFO L78 Accepts]: Start accepts. Automaton has 65963 states and 107910 transitions. Word has length 135 [2021-12-06 17:35:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:30,737 INFO L470 AbstractCegarLoop]: Abstraction has 65963 states and 107910 transitions. [2021-12-06 17:35:30,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 65963 states and 107910 transitions. [2021-12-06 17:35:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:35:30,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:30,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:30,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:35:30,762 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2015989863, now seen corresponding path program 1 times [2021-12-06 17:35:30,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:30,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821997934] [2021-12-06 17:35:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:30,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:30,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:35:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:30,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:35:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:30,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:35:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:30,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:35:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:35:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:30,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:30,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821997934] [2021-12-06 17:35:30,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821997934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:30,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:30,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:35:30,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922018133] [2021-12-06 17:35:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:30,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:35:30,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:35:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:30,940 INFO L87 Difference]: Start difference. First operand 65963 states and 107910 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:46,472 INFO L93 Difference]: Finished difference Result 256371 states and 422231 transitions. [2021-12-06 17:35:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:35:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:35:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:47,142 INFO L225 Difference]: With dead ends: 256371 [2021-12-06 17:35:47,142 INFO L226 Difference]: Without dead ends: 190425 [2021-12-06 17:35:47,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:35:47,289 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 1314 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:47,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 2174 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 17:35:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190425 states. [2021-12-06 17:35:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190425 to 131629. [2021-12-06 17:35:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131629 states, 120078 states have (on average 1.5493512550175719) internal successors, (186043), 120592 states have internal predecessors, (186043), 7960 states have call successors, (7960), 3079 states have call predecessors, (7960), 3590 states have return successors, (28153), 8469 states have call predecessors, (28153), 7958 states have call successors, (28153) [2021-12-06 17:35:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131629 states to 131629 states and 222156 transitions. [2021-12-06 17:35:56,418 INFO L78 Accepts]: Start accepts. Automaton has 131629 states and 222156 transitions. Word has length 135 [2021-12-06 17:35:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:56,419 INFO L470 AbstractCegarLoop]: Abstraction has 131629 states and 222156 transitions. [2021-12-06 17:35:56,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 131629 states and 222156 transitions. [2021-12-06 17:35:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:35:56,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:56,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:56,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:35:56,469 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:56,469 INFO L85 PathProgramCache]: Analyzing trace with hash -889683419, now seen corresponding path program 1 times [2021-12-06 17:35:56,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:56,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670922502] [2021-12-06 17:35:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:56,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:56,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:35:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:56,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:35:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:56,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:35:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:35:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:56,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:35:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:56,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:56,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670922502] [2021-12-06 17:35:56,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670922502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:56,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:56,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:35:56,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486459546] [2021-12-06 17:35:56,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:56,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:35:56,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:35:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:56,558 INFO L87 Difference]: Start difference. First operand 131629 states and 222156 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:36:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:26,621 INFO L93 Difference]: Finished difference Result 502771 states and 854879 transitions. [2021-12-06 17:36:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:36:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:36:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:28,117 INFO L225 Difference]: With dead ends: 502771 [2021-12-06 17:36:28,118 INFO L226 Difference]: Without dead ends: 371159 [2021-12-06 17:36:28,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:36:28,485 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 1337 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:28,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1514 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1861 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:36:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371159 states. [2021-12-06 17:36:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371159 to 262702. [2021-12-06 17:36:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262702 states, 240143 states have (on average 1.5518628483861698) internal successors, (372669), 241169 states have internal predecessors, (372669), 15384 states have call successors, (15384), 6151 states have call predecessors, (15384), 7174 states have return successors, (75455), 16405 states have call predecessors, (75455), 15382 states have call successors, (75455) [2021-12-06 17:36:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262702 states to 262702 states and 463508 transitions. [2021-12-06 17:36:48,545 INFO L78 Accepts]: Start accepts. Automaton has 262702 states and 463508 transitions. Word has length 135 [2021-12-06 17:36:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:48,545 INFO L470 AbstractCegarLoop]: Abstraction has 262702 states and 463508 transitions. [2021-12-06 17:36:48,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:36:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 262702 states and 463508 transitions. [2021-12-06 17:36:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:36:48,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:48,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:48,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:36:48,726 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:36:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1371889831, now seen corresponding path program 1 times [2021-12-06 17:36:48,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:48,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357171225] [2021-12-06 17:36:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:48,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:48,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:36:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:36:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:48,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:36:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:36:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:48,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:36:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:48,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:48,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357171225] [2021-12-06 17:36:48,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357171225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:36:48,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:36:48,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:36:48,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140700850] [2021-12-06 17:36:48,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:36:48,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:36:48,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:36:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:36:48,799 INFO L87 Difference]: Start difference. First operand 262702 states and 463508 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:37:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:48,593 INFO L93 Difference]: Finished difference Result 986098 states and 1757557 transitions. [2021-12-06 17:37:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:37:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:37:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:51,672 INFO L225 Difference]: With dead ends: 986098 [2021-12-06 17:37:51,672 INFO L226 Difference]: Without dead ends: 723413 [2021-12-06 17:37:52,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:37:52,671 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1132 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:52,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 2224 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:37:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723413 states. [2021-12-06 17:38:31,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723413 to 524335. [2021-12-06 17:38:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524335 states, 480272 states have (on average 1.5541838791351568) internal successors, (746431), 482322 states have internal predecessors, (746431), 29720 states have call successors, (29720), 12295 states have call predecessors, (29720), 14342 states have return successors, (208913), 31765 states have call predecessors, (208913), 29718 states have call successors, (208913) [2021-12-06 17:38:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524335 states to 524335 states and 985064 transitions. [2021-12-06 17:38:34,972 INFO L78 Accepts]: Start accepts. Automaton has 524335 states and 985064 transitions. Word has length 135 [2021-12-06 17:38:34,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:34,972 INFO L470 AbstractCegarLoop]: Abstraction has 524335 states and 985064 transitions. [2021-12-06 17:38:34,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:38:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 524335 states and 985064 transitions. [2021-12-06 17:38:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:38:35,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:35,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:35,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:38:35,215 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:38:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash -494818843, now seen corresponding path program 1 times [2021-12-06 17:38:35,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:38:35,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900574391] [2021-12-06 17:38:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:35,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:38:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:35,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:38:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:38:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:38:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:35,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:38:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:38:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:38:35,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:38:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900574391] [2021-12-06 17:38:35,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900574391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:38:35,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:38:35,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:38:35,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974873335] [2021-12-06 17:38:35,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:38:35,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:38:35,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:38:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:38:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:38:35,300 INFO L87 Difference]: Start difference. First operand 524335 states and 985064 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:40:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:40:36,486 INFO L93 Difference]: Finished difference Result 1933809 states and 3690171 transitions. [2021-12-06 17:40:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:40:36,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-06 17:40:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:40:43,346 INFO L225 Difference]: With dead ends: 1933809 [2021-12-06 17:40:43,346 INFO L226 Difference]: Without dead ends: 1409491 [2021-12-06 17:40:45,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:40:45,776 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1194 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:40:45,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 2159 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:40:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409491 states. [2021-12-06 17:42:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409491 to 1046576. [2021-12-06 17:42:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046576 states, 960529 states have (on average 1.5564100615390062) internal successors, (1494977), 964627 states have internal predecessors, (1494977), 57368 states have call successors, (57368), 24583 states have call predecessors, (57368), 28678 states have return successors, (592903), 61461 states have call predecessors, (592903), 57366 states have call successors, (592903) [2021-12-06 17:42:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046576 states to 1046576 states and 2145248 transitions. [2021-12-06 17:42:24,740 INFO L78 Accepts]: Start accepts. Automaton has 1046576 states and 2145248 transitions. Word has length 135 [2021-12-06 17:42:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:24,740 INFO L470 AbstractCegarLoop]: Abstraction has 1046576 states and 2145248 transitions. [2021-12-06 17:42:24,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:42:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1046576 states and 2145248 transitions. [2021-12-06 17:42:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 17:42:25,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:25,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:25,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 17:42:25,330 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:42:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1801961241, now seen corresponding path program 1 times [2021-12-06 17:42:25,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:25,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528426015] [2021-12-06 17:42:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:25,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:25,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:42:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:25,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:42:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:25,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:42:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:25,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 17:42:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:25,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 17:42:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:25,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:25,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528426015] [2021-12-06 17:42:25,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528426015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:42:25,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:42:25,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:42:25,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695025634] [2021-12-06 17:42:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:42:25,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:42:25,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:42:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:42:25,411 INFO L87 Difference]: Start difference. First operand 1046576 states and 2145248 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)